After circulation of a draft EIS and consideration of comments received, the lead agencies, in cooperation with the applicant (if not a lead agency), must combine the final EIS and ROD, to the maximum extent practicable, unless:

The final EIS makes substantial changes to the proposed action that are relevant to environmental or safety concerns; or

There are significant new circumstances or information relevant to environmental concerns that bear on the proposed action or the impacts of the proposed action.

When the combined final EIS/ROD is a single document, it must include the content of a final EIS presented in § 771.125 and present the basis for the decision as specified in 40 CFR 1505.2, summarize any mitigation measures that will be incorporated in the project, and document any required Section 4(f) approval in accordance with part 774 of this chapter.

If the comments on the draft EIS are minor and confined to factual corrections or explanations that do not warrant additional agency response, an errata sheet may be attached to the draft statement pursuant to 23 U.S.C. 139(n)(1) and 40 CFR 1503.4(c), which together must then become the combined final EIS/ROD.

A combined final EIS/ROD will be reviewed for legal sufficiency prior to issuance by the Administration.

The Administration must indicate approval of the combined final EIS/ROD by signing the document. The provision on Administration's Headquarters prior concurrence in § 771.125(c) applies to the combined final EIS/ROD.

The Federal Register public availability notice published by EPA (40 CFR 1506.10) will not establish a waiting period or a period of time for the return of comments on a combined final EIS/ROD. When filed with EPA, the combined final EIS/ROD must be available at the applicant's offices and at appropriate Administration offices. A copy should also be made available at institutions such as local government offices, libraries, and schools, as appropriate. To minimize hardcopy requests and printing costs, the Administration encourages the use of project websites or other publicly accessible electronic means to make the combined final EIS/ROD available.